Thank you all for your responses! The bulk of the responses make it sound like the change should be used less often than it has been because of the fact that these batters aren't able to catch up to her fastball. That being the case, could someone recommend pitch selection if all she's throwing is fastballs? She can place it very well inside outside, high, low. Start inside and then play the outside of the plate? Outside all day long? Any advice here would be appreciated!!